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An F-15E Strike Eagle from Royal Air Force Lakenheath, England, takes on fuel from a KC-135 Stratotanker March 28, 2014, during exercise Tonnerre Lightning. The exercise was a combined endeavor between U.S., British and French air force members to train for real world operations. The KC-135 is assigned to RAF Mildenhall, England. (U.S. Air Force photo/Airman 1st Class Dillon Johnston)